Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-09-23
Phys. Rev. B-83-6-064424-2011
Physics
Condensed Matter
Strongly Correlated Electrons
8 pages, 8 figures
Scientific paper
10.1103/PhysRevB.83.064424
We study the effect of uniform uniaxial strain on the ground state electronic configuration of a thin film manganite. Our model Hamiltonian includes the double-exchange, the Jahn-Teller electron-lattice coupling, and the antiferromagnetic superexchange. The strain arises due to the lattice mismatch between an insulating substrate and a manganite which produces a tetragonal distortion. This is included in the model via a modification of the hopping amplitude and the introduction of an energy splitting between the Mn e_g levels. We analyze the bulk properties of half-doped manganites and the electronic reconstruction at the interface between a ferromagnetic and metallic manganite and the insulating substrate. The strain drives an orbital selection modifying the electronic properties and the magnetic ordering of manganites and their interfaces.
Baena A.
Brey Luis
Calderon M. J.
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